Prior to being elected to the State Legislature, Dierks served on the
Ewing Public Board of Education from 1969? to 1984, and returned to serve briefly on that board again from 2004 to 2006. He has also served on the Board of Directors for St. Anthony's Hospital in
O'Neill, Nebraska, a member of the Knights of Columbus, a licensed pilot and was a member of, (and former president of), the Nebraska Veterinary Medical Association. Dierks was also a founding member of OCM, (the Organization For Competitive Markets), as well as R-Calf, (Ranchers-Cattlemen Action Legal Fund), and ICON, (Independent Cattlemen of Nebraska). Dierks was also an inductee into the Nebraska Hall of Agricultural Achievement in April, 2010, for his efforts in assisting Nebraska farmers and ranchers.
State legislature Dierks was first elected to the Legislature in 1986 and was re-elected in 1990, 1994, and 1998 to represent the 40th Legislative District. Redistricting following the 2000 Census forced him to run against incumbent
Doug Cunningham, in a district that was primarily previously represented by Cunningham. Cunningham won the election. When newly enacted term limits prevented Cunningham from seeking re-election in 2006, Dierks ran successfully, amid a field of three, for the seat. Because Nebraska's legislative term limits deal only with consecutive terms, Dierks was eligible to seek another term in 2010. He ran, but was defeated by
Tyson Larson of
O'Neill. In the legislature, Dierks sat on the Agriculture, Committee On Committees, General Affairs, Revenue, and State-Tribal Relations Committees. ==References==